After a spaceship crashes on Earth, a giant egg rolls from the wreckage. The egg quickly hatches to reveal an alien dinosaur. Due to the Earth's atmosphere, the newly hatched alien dinosaur rapidly increases in size. The dinosaur turns its attention towards a railway township, which it attacks, causing great destruction. The alien dinosaur sees a water tower, which it commences to climb. The continued affect of Earth's atmosphere on the alien dinosaur makes the creature burn, destroying it.